UL 2523-2009 UL Standard for Safety Solid Fuel-Fired Hydronic Heating Appliances Water Heaters And Boilers (First Edition Reprint with Revisions Through and Including March 16 2018_1.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2523 Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters, And BoilersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPY

2、RIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters, And Boilers, UL 2523 First Edition, Dated December 22, 2009 Summary of Topics These revisions to ANSI/UL 2523 ar

3、e being issued to address: ANSI/ASME pressure vessel stamps Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective da

4、te note indicating the date of publication or the date on which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated September 21, 2012 and November 16, 2012. All rights reserved. No part of this publication may be

5、 reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, th

6、e implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this St

7、andard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agr

8、ee to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requ

9、irements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future e

10、ffective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. The following table lists the future effective dates with the corresponding reference. FEBRUARY 8, 2013 UL 2523 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHO

11、UT PERMISSION FROM UL Future Effective Date Reference June 22, 2012 Entire Standard FEBRUARY 8, 2013 UL 2523 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 22, 2009 (Title Page Reprinted: February 8, 2013) 1 UL 2523 Standard for

12、 Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters, And Boilers Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Solid Fuel-Fired Water Heaters And Boilers, SU 2523. First Edition December 22, 2009 This A

13、NSI/UL Standard for Safety consists of the First Edition including revisions through February 8, 2013. The most recent designation of ANSI/UL 2523 as an American National Standard (ANSI) occurred on February 8, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Ti

14、tle Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are c

15、opyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 2523

16、-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 22, 2009 UL 2523 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7

17、2 Components 7 3 Units of Measurement .8 4 Undated References 8 5 Glossary .8 CONSTRUCTION ALL APPLIANCES 6 General .11 7 Corrosion Protection .11 8 Protection of Users and Service Personnel .12 9 Enclosures 17 9.1 General 17 9.2 Accessibility of uninsulated live parts and lm-coated wire 24 9.3 Door

18、s and covers .25 9.4 Field wiring system connection 27 10 Field Wiring 27 10.1 General .27 10.2 Leads and terminals 30 11 Internal Wiring 31 11.1 General .31 11.2 Methods 32 11.3 Short-circuit protection 35 12 Separation of Circuits .36 13 Bonding for Grounding 38 14 Mounting of Electrical Component

19、s .42 15 Motors and Motor Overload Protection 43 16 Overcurrent Protection of High-Voltage Control-Circuit Conductors 47 16.1 General .47 16.2 Direct-connected high-voltage control circuit .47 16.3 Tapped high-voltage control circuits 47 16.4 Overcurrent-protective devices .48 17 Overcurrent Protect

20、ion of Transformers 49 17.1 High-voltage transformers .49 17.2 Low-voltage transformers 49 18 Switches and Controllers 50 19 Capacitors .51 20 Electrical Insulating Materials 51 21 Spacings High-Voltage Circuits .52 22 Spacings Low-Voltage Circuits 53 23 Control Applications .53 DECEMBER 22, 2009 UL

21、 2523 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL BOILERS 24 Assembly 55 25 Accessibility for Servicing .56 26 Casing 56 27 Radiation Shields or Liners 57 28 Combustion Chamber 57 29 Baffles.57 30 Flue Collar 58 31 Flue Dampers, Draft R

22、egulators, and Air Shutters 58 32 Controls .59 32.1 Application 59 32.2 Operating controls 59 32.3 Limit controls 60 32.4 Liquid level limit controls 61 32.5 Pressure limit controls 62 32.6 Temperature limit controls .62 32.7 Installation of external controls and ttings 62 HYRDRONIC HEATING APPLIANC

23、ES AND WATER HEATERS 33 Assembly 64 34 Accessibility for Servicing .65 35 Base 65 36 Casing 65 37 Radiation Shields .66 38 Insulation Materials .66 39 Combustion Chamber 66 40 Heating Surface Joints 67 41 Baffles.67 42 Air Shutters and Flue Collars .68 43 Materials in Contact with Water .68 43.1 Gen

24、eral .68 43.2 Dip tubes 69 43.3 Polymeric storage tank liner .69 44 Water-Storage Vessels .69 45 Controls .70 45.1 Application 70 45.2 Limit control .71 45.3 Water-temperature regulating control .73 PERFORMANCE 46 General 74 47 Test Installation for Standard Clearances .76 47.1 Enclosure .76 47.2 Ch

25、imney connector .78 48 Initial Test Conditions .82 49 Instrumentation .83 49.1 Draft 83 49.2 Power measurement 83 49.3 Speed measurement .84 49.4 Temperature measurement 84 DECEMBER 22, 2009 UL 2523 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION F

26、ROM UL 50 Test Voltage .87 51 Solid Fuels and Test Firing Procedures 87 51.1 General .87 51.2 Firebrands and hardwood logs .88 51.3 Charcoal 91 51.4 Wood pellets 91 51.5 Automatically Fueled Appliances .92 52 Water Temperature Control Test Hydronic Heating Appliance and Water Heater 93 53 Limit Cont

27、rol Test Water Heater 93 54 Limit Control and Low Water Control Test Boiler 94 55 Temperature Test .95 56 Continuous Operation Test .99 56.1 General .99 56.2 Continuous operation .99 56.3 Motor and controller failure .100 56.4 Loss of electrical power 100 57 Electrical Tests 101 57.1 Dielectric test

28、 .101 57.2 Short-circuit test 102 58 Non-Metallic Dip Tube Test Water Heaters 105 58.1 Deformation of weight loss .105 58.2 Resistance to crushing .106 58.3 Collapse .108 59 Hydrostatic Test on Water-Storage Vessels Water Heater 109 OUTDOOR USE EQUIPMENT CONSTRUCTION 60 General 110 61 Enclosures 110

29、 62 Field Wiring Connections 113 63 Wiring 113 64 Electrical Insulation Material 114 PERFORMANCE 65 Water Spray Test 114 66 Metallic Coating Thickness Test Chromic Acid Dropping Test .117 MANUFACTURING AND PRODUCTION TESTS 67 General 119 68 Hydrostatic Test on Water-Storage Vessels Water Heater 119

30、69 Production Line Dielectric Voltage-Withstand Test 120 MARKINGS 70 General 121 71 Nameplate Markings .121 72 Supplementary Markings .123 73 Marking Permanency Tests .129 73.1 General 129 DECEMBER 22, 2009 UL 2523 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITH

31、OUT PERMISSION FROM UL 73.2 Air oven-aging test 129 73.3 Humidity test .130 73.4 Unusual-condition exposure test 130 INSTRUCTIONS 74 General 130 DECEMBER 22, 2009 UL 2523 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope

32、1.1 These requirements apply to factory built manually and/or automatically fueled solid fuel-red hydronic heating appliances, water heaters and boilers, as dened in Section 5, Glossary, intended to be xed non-moveable appliances. 1.1 effective June 22, 2012 1.2 The appliances are intended to burn s

33、olid fuels, such as wood, coal, or any other biomass fuel, as specied by the manufacturer. 1.2 effective June 22, 2012 1.3 The appliances are provided with an integral chimney and termination or intended for connection to chimneys for residential type and building heating appliances or for building

34、heating appliances in compliance with the Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances, NFPA 211, and intended for installation in compliance with the National Electrical Code, ANSI/NFPA 70; and the International Mechanical Code (ICC), International Residential Code (I

35、CC) and the Uniform Mechanical Code (IAPMO), as applicable. 1.3 effective June 22, 2012 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this Standard shall comply with the requirements for that component. 2.1 effective June 22, 2012 2.2 A component is not required to

36、 comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.2 effective June 22, 2012 2.3 A component shall be used in accordance wit

37、h its rating established for the intended conditions of use. 2.3 effective June 22, 2012 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not excee

38、ding specied limits, and shall be used only under those specic conditions. 2.4 effective June 22, 2012 DECEMBER 22, 2009 UL 2523 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses ar

39、e the requirement. Values in parentheses are explanatory or approximate information. 3.1 effective June 22, 2012 3.2 Unless indicated otherwise, all voltage and current values mentioned in this Standard are rms. 3.2 effective June 22, 2012 4 Undated References 4.1 Any undated reference to a code or

40、standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 4.1 effective June 22, 2012 5 Glossary 5.1 For the purpose of this Standard, the following denitions apply. 5.1 effective June 22, 2012 5.2 AIR SHUTTER An adjusta

41、ble device for varying the size of the air inlet or inlets regulating primary air, secondary air, or both. It may be either manually or automatically operated. 5.2 effective June 22, 2012 5.3 APPLIANCE FLUE The passages within the product that conduct the products of combustion (ue gases) through th

42、e product. 5.3 effective June 22, 2012 5.4 BOILER A closed vessel in which water or some other liquid is heated or in which steam is generated or superheated, under pressure or vacuum, by direct application of heat. 5.4 effective June 22, 2012 5.5 BOILER, HIGH PRESSURE STEAM A boiler in which steam

43、is generated at a pressure higher than 15 psig (103 kPa). 5.5 effective June 22, 2012 5.6 BOILER, HIGH TEMPERATURE WATER A boiler intended for operation at a pressure exceeding 160 psig (1103 kPa) or at a temperature exceeding 250F (121C) or both. 5.6 effective June 22, 2012 5.7 BOILER, HOT WATER A

44、boiler that furnishes hot water at a pressure not exceeding 160 psig (1103 kPa) and at a temperature not exceeding 250F (121C). 5.7 effective June 22, 2012 5.8 BOILER, LOW PRESSURE STEAM A boiler in which steam is generated at a pressure not exceeding 15 psig (103 kPa). 5.8 effective June 22, 2012 5

45、.9 CHIMNEY CONNECTOR The pipe that connects a fuel-burning product to a chimney. 5.9 effective June 22, 2012 DECEMBER 22, 2009 UL 2523 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.10 COMBUSTIBLE MATERIAL Combustible material as pertain

46、ing to materials adjacent to or in contact with heat-producing appliances, chimney connectors and vent connectors, steam and hot water pipes, refers to material made of or surfaced with wood, compressed paper, plant bers, or other material that will ignite and burn. Such material shall be considered

47、 as combustible even through ameproofed, re-retardant treated, or plastered. 5.10 effective June 22, 2012 5.11 COMBUSTIBLE, NONCOMBUSTIBLE PRODUCTS These terms, as used in this standard, are dened in the Standard Glossary of Terms Relating to Chimneys, Vents, and Heat-Producing Appliances, NFPA 97.

48、5.11 effective June 22, 2012 5.12 CONTROL, LIMIT An automatic control responsive to changes in pressure or temperature and intended to limit the operation of the controlled equipment. 5.12 effective June 22, 2012 5.13 CONTROL, SAFETY Any automatic control, such as a relay or switch, used in conjunct

49、ion with other auxiliary equipment to form a safety control system that is relied upon to reduce the risk of re, electric shock, or injury to persons. 5.13 effective June 22, 2012 5.14 CONTROL, THERMOSTATIC DAMPER An automatic control responsive to changes in temperature. Usually acts through direct mechanical linkage to reduce or increase the supply of air needed for combustion, thereby regulating the combustion rate and limiting the operation of the product when the